lstarFromY static method
Converts a Y value to an L* value.
L* in Lab* and Y in XYZ measure the same quantity, luminance.
L* measures perceptual luminance, a linear scale. Y in XYZ measures relative luminance, a logarithmic scale.
y
Y in XYZ
Returns L* in Lab*
Implementation
static double lstarFromY(double y) {
return _labF(y / 100.0) * 116.0 - 16.0;
}